let detaily = 24

let done = 0;

​

function setup() {

  createCanvas(800, 800);

  frameRate(30);

  angleMode(RADIANS);

  ellipseMode(RADIUS);

  background(0);

}

​

function draw() {

  background(0,20);

  translate(width/2,height/2);

  noFill();

  strokeWeight(1);

  stroke(255);

  let i = frameCount/5.0+200;

  //ellipse(0,0,i);

  if (i<100) 

    return

  let r1 = floor(i/20)*20;

  stroke(255);

  if (i>r1){

    ellipse(0,0,r1);

    stroke(255,0,0);

    for (let theta=0;theta<2*PI;theta+=PI/30){

      ellipse(r1*cos(theta),r1*sin(theta),i-r1);

    }

  }

}